'Heart' in the Bible

But as it is written:What eye did not see and ear did not hear,and what never entered the human mind—God prepared this for those who love Him.

But he who stands firm in his heart (who is under no compulsion, but has control over his own will) and has decided in his heart to keep his own virgin, will do well.

The secrets of his heart will be revealed, and as a result he will fall facedown and worship God, proclaiming, “God is really among you.”